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Community Water System · PWS 105300009

Paschal Sherman Indian School

Washington, EPA Region 10 — Tribal Water Systems 20240 - drinking water served from groundwater sources to 220 people, tracked in EPA SDWIS and UCMR5.

220
People served
195
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 195 drinking-water violations at Paschal Sherman Indian School, 3% of them health-based.

195
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
220
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Paschal Sherman Indian School

Paschal Sherman Indian School is a native american-owned community water system that delivers drinking water to 220 residents in Washington, EPA Region 10 — Tribal Water Systems through 28 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 195 total violations for this system , of which 5 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 178 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 16 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 10 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
220
Total Violations
195
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
28
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
178
Treatment Tech Violations
5

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 16 2011
Nitrate MR 9 2023
Chlorine MR 9 2024
Lead and Copper Rule MR 6 2023
Revised Total Coliform Rule MON 5 2024
TTHM MR 5 2015
Consumer Confidence Rule Other 5 2009
Total Haloacetic Acids (HAA5) MR 5 2015
Groundwater Rule TT 4 2023
Combined Radium (-226 and -228) MR 4 2011
Gross Alpha, Excl. Radon and U MR 4 2011
Combined Uranium MR 3 2011
Benzene MR 3 2017
Arsenic MR 3 2020
Atrazine MR 3 2008
trans-1,2-Dichloroethylene MR 2 2017
1,2-Dichloroethane MR 2 2017
1,1,1-Trichloroethane MR 2 2017
Carbon tetrachloride MR 2 2017
Trichloroethylene MR 2 2017
1,1,2-Trichloroethane MR 2 2017
Toluene MR 2 2017
Ethylbenzene MR 2 2017
Styrene MR 2 2017
Chromium MR 2 2008
Cadmium MR 2 2008
Barium MR 2 2008
Endrin MR 2 2008
Methoxychlor MR 2 2008
Xylenes, Total MR 2 2017

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Paschal Sherman Indian School.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID 105300009 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 10 — Tribal Water Systems Drinking Water Authority

EPA Region 10 — Tribal Water Systems's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find 10 regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Chlorine MR 9 SDWIS / 105300009 / 0999
2024 Revised Total Coliform Rule MON 5 SDWIS / 105300009 / 8000
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / 105300009 / 5200
2024 Public Notice Other 1 SDWIS / 105300009 / 7500
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / 105300009 / 5200
2023 Nitrate MR 9 SDWIS / 105300009 / 1040
2023 Lead and Copper Rule MR 6 SDWIS / 105300009 / 5000
2023 Groundwater Rule TT 4 SDWIS / 105300009 / 0700
2020 Arsenic MR 3 SDWIS / 105300009 / 1005
2017 Benzene MR 3 SDWIS / 105300009 / 2990
2017 trans-1,2-Dichloroethylene MR 2 SDWIS / 105300009 / 2979
2017 1,2-Dichloroethane MR 2 SDWIS / 105300009 / 2980
2017 1,1,1-Trichloroethane MR 2 SDWIS / 105300009 / 2981
2017 Carbon tetrachloride MR 2 SDWIS / 105300009 / 2982
2017 Trichloroethylene MR 2 SDWIS / 105300009 / 2984

How Paschal Sherman Indian School Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Paschal Sherman Indian School EPA Region 10 — Tribal Water Systems avg Federal benchmark
Total violations 195 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 220 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 10 — Tribal Water Systems.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Paschal Sherman Indian School water safe to drink? ▼
Paschal Sherman Indian School (PWS ID: 105300009) has 195 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 220 people using Groundwater sources.
How many people does Paschal Sherman Indian School serve? ▼
Paschal Sherman Indian School serves 220 people in Washington, EPA Region 10 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 28 service connections.
What type of violations does Paschal Sherman Indian School have? ▼
Paschal Sherman Indian School has 195 total violations: 5 health-based violations (MCL exceedances or treatment failures), 178 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Paschal Sherman Indian School water? ▼
No PFAS testing data is available for Paschal Sherman Indian School under the EPA's UCMR5 monitoring program.
What water source does Paschal Sherman Indian School use? ▼
Paschal Sherman Indian School uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.